baber/WOPTO huggingface dataset:
Patent CA-1194166-A (CA)
Inventor: VIRDEE NIRMAL S
IPC: H04B3/23
Filed: 1983-06-23
Granted: 1985-09-24
Abstract: ABSTRACT: "Digital duplex communication system".     A digital duplex communication system includes an echo canceller of the look-up table type. The echo canceller comprises a random access memory (RAM) (41), a digital to analogue converter (DAC) (45), a subtractor (5), adaption means (47), and an address generator (40). The echo canceller stores echo replicas for combinations of data bits transmitted by the transmitter (1) and sub-tracts these echo replicas from a received signal on line (9) before application to the receiver (2).          The capacity required for the RAM (41) is reduced by storing only one echo replica for each of two comple-mentary sets of data. To achieve this the address generator (40) is split into a primary address generator (73) and a complementary address generator (74) so that complementary sets of data present the same address to the RAM (41). The primary address generator (73) produces a signal to in-dicate which of the two complementary data sequences is being transmitted and appropriately sets the adaption means (47) over line (71) and a complementing circuit (70) over line (72). The combination of the signal on line (71) and the output of the subtractor (5) on line (12) causes the echo replica to be updated by the adaption means (47) which may be an adder circuit. The complementing circuit (70) operates on the output of the RAM (41) via the latch circuit (43) to determine the sign of the echo replica applied to the subtractor (5) via the DAC (45).
Patent CA-1219858-A (CA)
Inventor: SCHUI FRANZ
IPC: C09B29/15
Filed: 1983-06-24
Granted: 1987-03-31
Abstract: Abstract of the disclosure:          A novel crystallographic modification (.beta.-modification) of the pigment C I. Pigment Red 53:1 is described and claimed which has characteristic reflection values in its X-ray diffraction pattern obtained by means of Cu-K.alpha. radiation. This novel pigment form is obtained by reacting an aqueous solution of an alkali metal or ammonium salt of the formula 1                 (1) with the equivalent amount of a water-soluble barium salt in the presence of a compound of the formula 2                 (2), The modification is distinguished by a more yellowish-red shade as compared to the known .alpha.-modifiaction.
Patent CA-1200521-A (CA)
Inventor: LLOYD NORMAN E
IPC: C12P19/24
Filed: 1983-06-30
Granted: 1986-02-11
Abstract: ABSTRACT OF THE DISCLOSURE         A process is provided for the direct enzymatic isomerization of a glucose-containing feed liquor to provide a high quality fructose-glucose syrup of from about 50 to about 60 weight percent fructose based on total carbohydrate of the original feed without the need for fractionation and recycle operations.  The process features careful adjustment of pH and contact times of feed liquor with glucose isomerase.
Patent CA-1229317-A (CA)
Inventor: YEH GEORGE C
IPC: C10G21/00
Filed: 1983-07-12
Granted: 1987-11-17
Abstract: ABSTRACT OF THE DISCLOSURE     Herein are disclosed a method and apparatus whereby all petroleums and/or related materials, including natural materials (such as, petroleum gas, crude oils, bitumens, crude oils from oil sands and oil shales, tars from sands, etc.), fraction or fractions derived from said natural materials, and refinery streams and products, are refined and separated to remove their asphaltic constituents (asphaltenes, resins, etc.) and/or nonhydrocarbon con-stituents (metals, heteroatoms, etc.), by contacting said petroleums and/or said related materials with an added asphaltenes, precipitating said constituents together with said added asphaltenes, and then separating the mixture of the resultant precipitates and said added asphaltenes to recover an oil and/or gas) having a reduced concentra-tion of said constituents.      Said mixture can also be separated to remove its residual volatile constituents to produce asphalts; or it can be treated by a low molecular weight paraffinic solvent to recover asphaltenes, which would have numerous potential usages although they have not been available commercially.
Patent CA-1256899-A (CA)
Inventor: CORDI ALEXIS
IPC: C07C227/00
Filed: 1983-08-17
Granted: 1989-07-04
Abstract: ABSTRACT          Derivatives of .omega.-amino acids of general formula :                                          I   also racemic or non-racemic mixtures thereof, optically pure isomers thereof and salts of these compounds formed with pharmaceutically utilisable acids, bases and metals, wherein R represents a linear or branched alkyl radical C2-C12, a linear or branched alkyl radical C2-C4 substituted by a phenyl or phenoxy nucleus which may be itself substituted, a linear or branched acyl radical C2-C6 substituted by a phenyl nucleus which may be itself substituted; R1 represents hydrogen, a linear or branched acyl radical C2-C11, a linear or branched acyl radical C2-C6 substituted by a phenyl nucleus which may be itself substituted; R2 is an amino group, and n is equal to 3, 4 or 5.  Such derivatives can be used in the treatment of neurological, psychic or cardiovascular problems, and as anthelminthic and analgesic agents.
Patent CA-1185983-A (CA)
Inventor: WRIGHT GEORGE J
IPC: A61P25/08
Filed: 1983-08-25
Granted: 1985-04-23
Abstract: ABSTRACT OF THE DISCLOSURE         N-Formyl andN-hydroxymethyl-3-phenoxy-l-azetidine-carboxamidess having the formula:       wherein R is selected from formyl and hydroxymethyl and R1 is selected from hydrogen, fluoro, loweralkyl, loweralkoxy, trifluoromethyl, acetyl, N-formylcarboxamido or N-hydroxymethylcarboxamido having antidepressant activity are disclosed.
Patent CA-1199854-A (CA)
Inventor: SMALLHORN EDWARD A
IPC: F15D1/06
Filed: 1983-08-31
Granted: 1986-01-28
Abstract: ABSTRACT OF THE DISCLOSURE           The specification describes a laminar flow element for use in a cylindrical fluid flow passage for restricting the flow of fluid through that passage to a constant volume flow rate, the element comprising a body portion having a cylindrical peripheral surface of predetermined length and predetermined diameter, the surface defining with the passage an annular, tubular fluid passage, and means extending from the element for engagement with at least one surface in the cylindrical passage for maintaining the peripheral surface concentrically disposed within the cylindrical passage, the length and diameter of the element being dimensioned so that the flow is laminar under all operating conditions and therefore the volume rate of flow of fluid through the passage is linearly proportional to the pressure drop along the annular passage.
Patent CA-1214313-A (CA)
Inventor: BERGLIN THOMAS
IPC: C01B15/023
Filed: 1983-09-07
Granted: 1986-11-25
Abstract: CANADIAN PATENT APPLICATION     OF     THOMAS BERGLIN and WOLFGANG HERRMANN     FOR     A METHOD IN THE PRODUCTION OF HYDROGEN PEROXIDE     Abstract of the Disclosure:     A method in the production of hydrogen peroxide is described, utilising the so-called anthraquinone process in which alkylated anthraquinones dissolved in organic solvents to form a liquid working solution, are alternately reduced and oxidised. The working solu-tion is subjected to catalytic hydrogenation by con-tacting it with hydrogen in the presence of a hydro-genation catalyst. The contact with hydrogen is establish-ed in a fixed catalyst bed comprising one or more solid catalyst bodies, each of which consists of a thin-walled, coherent, solid body of a structure forming parallel 1a channels through which the working solution and hydrogen gas are allowed to pass. The channels of the catalyst bed are of equal length and parallel to the direction of flow of the working solution. The catalyst preferably is provided in a thin layer on the walls of the struc-ture, preferably by means of a porous carrier.     1b
Patent CA-1242463-A (CA)
Inventor: MCKENNA ALEX G
IPC: B23C5/24
Filed: 1983-09-16
Granted: 1988-09-27
Abstract: TITLE OF THE INVENTION                  MULTI-INSERT CUTTER BIT                   ABSTRACT OF THE DISCLOSURE      A cutter bit is disclosed having a shank with a forward working portion and multiple inserts mounted on the forward working portion.  One of the inserts is a lead insert facing and projecting foremost in the direction of rotation or travel of the bit.  A clearance face is provided rearwardly of the lead insert so as to reduce the rubbing action that occurs between the cutter bit and the material formation to be removed.  The lead insert can be a laminated insert with a metal shim between individual inserts.  Another insert is located rearwardly of the lead insert in the clearance face of the bit and projects out of said clearance face to control the wear of the clearance face during the life of the cutter bit.          A cutting edge may be formed on the wear controlling insert projecting from the clearance face.
Patent CA-1196621-A (CA)
Inventor: CHAUDHURI AJIT K
IPC: B01D15/08
Filed: 1983-09-28
Granted: 1985-11-12
Abstract: POLYMERIC SUPPORTED EXTRACTANTS FOR THE REMOVAL OF METAL VALUES AND ORGANIC COMPOUNDS FROM AQUEOUS SOLUTIONS                   Abstract of the Disclosure Polymeric supported extractants, their use and preparation  are  disclosed.    Said extractants comprise macroreticular resins containing phosphorus based extract-ant compounds encapsulated therein.   The extractants are useful for the extraction of mineral values and organic compounds from aqueous solutions and may be prepared by the suspension polymerization of a monovinylidine compound and a polyvinylidine compound in a solution of the phosphorus-based extractant and a short chain (C4 to C10) alkanol.
Patent CA-1213830-A (CA)
Inventor: BAUER KURT H
IPC: A61K9/107
Filed: 1983-10-06
Granted: 1986-11-12
Abstract: ABSTRACT      Anhydrous emulsion with an oil phase (o) and a hydrophilic phase (p) of water-soluble, but anhydrous liquids, particularly as a filler matrix for medicinal preparations in capsules, which on the one hand does not attack the capsule wall and on the other permits an excellent active agent release.
Patent CA-1227766-A (CA)
Inventor: FELTHUIS JACOB
IPC: C10B29/06
Filed: 1983-10-19
Granted: 1987-10-06
Abstract: "Coke oven battery"     ABSTRACT OF THE DISCLOSURE     A coke oven battery has horizontal coking chambers and a roof. Vertical conduits extend through the roof.  In order to prevent leakage of gas through the roof a gas tight screen of metal sheet is provided in the roof.  The screen consists of substantially horizontal sections extending between the vertical conduits and substantially vertical sections adjacent the vertical conduits.  The vertical sections have a gas-tight seal to mounded bricks at the top of the vertical conduits by casting in concrete a stepped portion of those sections and the mounded bricks.
Patent CA-1241349-A (CA)
Inventor: WU MARGARET M
IPC: C07C11/02
Filed: 1983-11-22
Granted: 1988-08-30
Abstract: CONVERSION OF METHANOL AND METHYL ETHER TO LIGHT OLEFINS       ABSTRACT        A process is provided for converting a feedstock comprising methanol and/or methyl ether to product comprising light olefins over a catalyst comprising a synthetic porous crystalline zeolite material designated zeolite ZSM-45 in the presence of a diluent comprising hydrogen-containing gas.
Patent CA-1204497-A (CA)
Inventor: KUHFUS GERD
IPC: H04M1/03
Filed: 1984-02-17
Granted: 1986-05-13
Abstract: TELEPHONE HANDSET FOR A TELEPHONE SET          Abstract of the Disclosure A telephone handset is made with two elongate molded parts, a back part and a front part.  The back part is arcuate in side view and is substantially rigid.  The front part has a substantially flat central portion which is flexible, with a housing at each end for the transmitter and receiver. The two parts are assembled by flexing the front part to conform to the back part, the two parts being connected together.  This avoids the need for complex molds for molding the front part as no re-entrant walls occur for the housings.                            - i -
Patent CA-1221087-A (CA)
Inventor: BARR JOHN D
IPC: E21B10/567
Filed: 1984-02-20
Granted: 1987-04-28
Abstract: Abstract of the Disclosure A drill bit comprises a bit body having an operating end face. A plurality of self-sharpening cutters are mounted in the bit body and extend through the operating end face. The cutters have cutting faces adapted to engage an earth formation and cut the earth formation to a desired three-dimensional profile. The cutting faces define surfaces having back rake angles which decrease with distance from the profile.   The individual cutting faces may be inwardly concave in a plane parallel to the intended direction of motion of the cutter in use. Each of the cutting members has a stud portion disposed in a respective recess in the bit body and defining the inner end of the cutting member, the cutting face being generally adjacent the outer end and having an outer cutting edge.  The centerline of the stud portion is rearwardly inclined, from the outer end to the inner end, with respect to the direction of movement in use, taken at the midpoint of the cutting edge, at a first angle from 80° to 30° inclusive.  The cutting face is oriented such that the tangent to the cutting face at the midpoint of the cutting edge and in the center plane of the cutting member is disposed at a second angle, from 18° to 75° inclusive, with respect to the centerline of the stud portion.
Patent CA-1216484-A (CA)
Inventor: CAMPBELL JOHN W E
IPC: F22B37/44
Filed: 1984-02-21
Granted: 1987-01-13
Abstract: ABSTRACT      A boiler safety valve installation with a safety valve 2 discharging relief steam through an upstand 10 into a separately supported vent pipe 12 (Fig.1).  The upstand discharges through a belled nozzle 24 of approximately 30° (0.5 steradian) included angle into the vent pipe 12 thereby, on discharge of relief steam, inducing a sub-atmospheric pressure in the space intermediate the discharge nozzle and the vent pipe and lessening the risk of escape of steam at a sliding junction between the upstand and the vent pipe.  In installation where the relief steam flow reaches supersonic velocity at discharge from the belled nozzle 24 the vent pipe diameter is constricted by about 5% - 10% at a zone 34 downstream of the discharge nozzle 24 to produce a shock front and reduce the velocity to sub-sonic, thereby reducing the frictional flow loss effects whilst economising in vent pipe size without causing a build-up of back pressure in the space intermediate the discharge nozzle and the vent pipe.
Patent CA-1208451-A (CA)
Title: Fertilizer product and process for making and using  it
Inventor: LAWHON WILLIAM T JR
IPC: C05G3/00
Filed: 1984-03-05
Granted: 1986-07-29
Abstract: IMPROVED FERTILIZER PRODUCT AND PROCESS         FOR MAKING AND USING IT                         ABSTRACT A process for making controlled release fertilizer product containing an increased amount of sustained-release nitrogen includes the step of mixing a partly water soluble thermoplastic binder, and urea-formaldehyde condensate and a pH modifier.  The amount of pH modifier should be sufficient to bring the pH of the shaped fertil-izer product to the range from about 6 to about 12. The mixture is subjected to such conditions including temperature and pressure so as to produce a shaped fer-tilizer product.  The resulting shaped fertilizer pro-duct includes approximately the same amount of sustained-release nitrogen as the urea-formaldehyde condensate in the mixture.
Patent CA-1231872-A (CA)
Inventor: MEYER STANLEY A
IPC: F02B43/10
Filed: 1984-03-09
Granted: 1988-01-26
Abstract: ABSTRACT           System and apparatus for the controlled intermixing of hydrogen/oxygen gasses with non-combustible gasses to reduce the burning temperature and velocity of the hydrogen gas in a burner. The system utilizes a hydrogen generator for developing the hydrogen/oxygen gasses.  The hydrogen gas with non-combustible gasses are intermixed in a controlled air intake chamber.  The exhaust gasses of the burner are returned as the non-combustible gasses to the mixing chamber in a closed loop arrangement.  Upon attaining the proper burning temperature and velocity of the hydrogen gas the ratio of hydrogen/oxygen and non-combustible gasses is maintained.  To effect a practical utilization, the generation of the hydrogen/oxygen gasses are controlled in start-up and in quantity.  The control of the generation of gasses is effected by one or more variable parameters; such as varying the voltage applied to the plates, varying the pulse rate of the voltage on the plates, varying the spacing between the plates, switching the number of plates, and plate configuration.  The hydrogen/oxygen generation is on demand; that is the hydrogen/oxygen generation on start-up is only on demand and thereafter generation is controlled in quantity by the need much in the same manner as an accelerator.
Patent CA-1188583-A (CA)
Inventor: TROUBRIDGE WILLIAM C
IPC: F41B5/18
Filed: 1984-04-17
Granted: 1985-06-11
Abstract: ABSTRACT           A novel trigger mechanism for a crossbow is disclosed, in which a relatively large mechanical advantage is employed to obtain reduced trigger pressures in comparison with trigger pressures in the prior art. The mechanism has two main components, namely a trigger and a catch, pivotally mounted in a case which is in turn mounted in the crossbow stock. The trigger has a trigger arm extending downwardly from the trigger pivot point and out of the case, and a sear arm extending forwardly and having a rearward-facing sear surface. The catch is installed with its pivot point slightly above the plane of a bowstring entry area in the case, and thus slightly above the plane of the bowstring.          The catch has a bowstring-retaining hook portion extending forwardly from the catch pivot point, and a catch arm extending downwardly from the catch pivot point and term-inating in a forward-facing sear surface, which is engaged by the sear surface of the trigger sear arm when the crossbow is armed. By virtue of a relatively high mechanical advantage in the catch, of about 4.5 to 1, combined with the mechanical advantage in the trigger and with lubrication and/or polishing of the sear surfaces, low trigger pressure is achieved. The trigger pressure is augmented by means of a spring installed between a portion of the case and the trigger.
Patent CA-1215783-A (CA)
Inventor: HORST ROBERT W
IPC: G06F9/30
Filed: 1984-09-28
Granted: 1986-12-23
Abstract: ABSTRACT           The various functional units which comprise a central processing unit of a computer are organized so as to enable a main arithmetic logic unit and special function units including an auxilliary arithmetic logic unit to access data registers, literal constants, and data from a memory cache.  A general purpose bus closely couples the functional units to the main data paths and allows the CPU sequencer to branch on numerous conditions which may be indicated via test lines.  Parity from the functional units is sent a clock cycle later than results in order that the parity path does not affect machine cycle time.  The architecture allows unused microcode options to be used to check for correct CPU operation by halting CPU operation on a miscompare of two buses.
Patent CA-1256291-A (CA)
Inventor: BRAITHWAITE DAVID
IPC: B65G25/00
Filed: 1984-10-03
Granted: 1989-06-27
Abstract: ABSTRACT OF THE DISCLOSURE A pusher cylinder for moving one or more glassware articles from an associated dead plate through a predetermined arcuate path onto an adjacent moving conveyor.  The pusher cylinder has a constant piston stroke length and rack and pinion means for adjusting the position of the piston relative to the dead plate.  Additionally, the pusher cylinder is provided with a splined central guide post for cooperative engagement with a complementarily splined bushing secured to one end of the piston of said pusher cylinder for providing longitudinal and rotational support for the piston.
Patent CA-1248993-A (CA)
Inventor: MADONIO ANDREW M
IPC: E05F15/04
Filed: 1984-10-22
Granted: 1989-01-17
Abstract: LOCKING MECHANISM FOR VEHICLE DOOR          Abstract of the Disclosure A locking mechanism for coach door leaves of the type which are rotated and then driven axially upward by a powered door operating mechanism.  Male and female locking bodies at the top of the door leaf shaft move together and apart axially without being radially engaged as the door leaf moves in or out at final closed position.  Any external outward pushing force on the door leaf radially engages the locking bodies to prevent door opening.
Patent CA-1247313-A (CA)
Inventor: YOSHIDA HIROSHI
IPC: B29C45/02
Filed: 1984-11-14
Granted: 1988-12-28
Abstract: ABSTRACT OF THE DISCLOSURE       A method of supplying a thermoplastic material to a molding machine for molding the same into a desired formation on slide fastener tapes is disclosed, whereby a composite plastic material consisting in such a predetermined ratio of a fresh supply of material and removed runners and sprues is fed so as to enable homogeneous color distribution of the resulting element chain on the fastener.
Patent CA-1263131-A (CA)
Inventor: MALECI GUGLIELMO
IPC: E04G7/30
Filed: 1984-12-13
Granted: 1989-11-21
Abstract: ABSTRACT A device for connecting a tubular horizontal member to a tubular upright in a scaffold for building, in which the horizontal member engages, by means of a fork, a tenon provided laterally on the upright, while a mutually parallel bolt and wedge extend through the fork and tenon to lock the fork on the tenon.
Patent CA-1258557-A (CA)
Inventor: HEURTAUX MICHEL
IPC: A61K6/06
Filed: 1985-02-13
Granted: 1989-08-22
Abstract: PATENT          BASAL CERAMIC LAYER FOR OPACIFYING THE METAL COPING OF A         CERAMO-METALLIC DENTAL RECONSTRUCTION     SUISSOR S.A.     Inventor: Michel HEURTAUX     ABSTRACT       The present invention relates to a ceramic basal layer for opacifying the metal coping of a ceramo-metallic dental reconstruction.       The ceramic basal layer for opacifying the metal coping of a ceramo-metallic dental reconstruction consists of an undercoat of opaque slip produced from a glass frit high in fluxes and in particular in B2O3, covered with an opaque layer produced from a glass frit high in opaci-fying metal oxides and containing approximately 30 % by weight of refractory particles with a particle size of between approximately 40 microns and approximately 100 microns.
Patent CA-1231251-A (CA)
Inventor: SHAW HERBERT J
IPC: G01C19/72
Filed: 1985-02-15
Granted: 1988-01-12
Abstract: GATED FIBER OPTIC ROTATION SENSOR    WITH EXTENDED DYNAMIC RANGE           Abstract A  fiber  optic  interferometer  sensor,  employing  the Sagnac  effect  comprising  all  fiber  optic  components positioned  along a  continuous,  uninterrupted  strand  of fiber  optic material.   The sensor includes a detection system  utilizing  a  modulator  or  modulators  for  phase modulating at  first  and  second  frequencies  light  waves which counter-propagate through a loop formed in the fiber optic  strand.   The second modulation  frequency is much lower than the first frequency.  An output signal from the sensor is gated  synchronously with respect to the phase modulation at the second  frequency so that the detected optical  output  signal  is  provided  only during  selected intervals of the phase modulation at the second frequency.    A  detector   generates   a   feedback  error   signal proportional to the magnitude of the optical output signal at the  first phase modulation  frequency.   The  feedback error  signal  controls  a  modulator  which  controls  the amplitude of the second frequency driving signal for the phase modulator such that the signal at the first phase modulation  frequency  in  the  output  signal  from  the rotation  sensor is substantially cancelled by the phase difference modulation  produced at the second  modulation frequency  during  the  interval  when  the  optical  output signal is present.